Can someone tell me how to split VAT on purchase from my banking tab (feed) ?

Hi there, @tania-russell-ho.

Thanks for dropping by here in the Community. I can share the steps on how to categorize the bank transaction in QuickBooks.

Since you want to split the VAT on the purchase, you can use the Split function on the Banking page. The steps below will help you with the process: 

1. On the left navigation bar, click Banking.
2. Go to the For Review section.
3. Click the transaction and select Split.
4. For each part of the split, enter a Category, a Payee, and the Amount.
5. Hit Save and add. 

For more information, as well as how to exclude bank transactions downloaded in bank feeds, I recommend the following article: Categorise and match online bank transactions in QuickBooks Online.

Please let me know if you need anything else regarding the banking feature. The Community and I will be here to help you.